公开(公告)号：US5498961A

公开(公告)日：1996-03-12

申请号：US207529

申请日：1994-03-07

申请人： Michael H. Kuhn ,  Volker Rasche ,  Roland Proksa

发明人： Michael H. Kuhn ,  Volker Rasche ,  Roland Proksa

IPC分类号： A61B5/055 ,  G01R33/54 ,  G01R33/567 ,  G01V3/14

CPC分类号： G01R33/56383

摘要： The invention relates to an MR method for two-dimensional or three-dimensional imaging of an examination zone, in which a set of raw data is measured repeatedly, an image of the examination zone can be reconstructed from each set, and the raw data of a set is acquired with different measurement parameters, and different sets contain raw data acquired with the same measurement parameters. Improved temporal resolution is achieved in that a set of auxiliary data is formed from at least two sets of raw data in order to produce an image representing the examination zone at a selectable instant, the auxiliary data being derived by interpolation from the raw data acquired with each time the same measurement parameters but at different measurement instants, the weight applied to the raw data entering the interpolation being greater as the time interval between the associated measurement instant and the selectable instant is smaller, the image of the examination zone being reconstructed from the set of auxiliary data.

摘要翻译： 本发明涉及一种用于检查区域的二维或三维成像的MR方法，其中重复测量一组原始数据，可以从每个组重建检查区域的图像，并且原始数据 采集不同测量参数的集合，不同的集合包含采用相同测量参数获得的原始数据。 通过从至少两组原始数据形成一组辅助数据，以在可选择的时刻产生表示检查区域的图像，辅助数据通过从用 每次相同的测量参数，但是在不同的测量时刻，施加到进入插值的原始数据的权重随着相关联的测量时刻和可选择时刻之间的时间间隔而变大，则检查区域的图像从 一组辅助数据。

公开(公告)号：US4949040A

公开(公告)日：1990-08-14

申请号：US325630

申请日：1989-03-20

申请人： Roland Proksa

发明人： Roland Proksa

IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/36

CPC分类号： G01R33/3621

摘要： A magnetic resonance spectrometer in which an analog-to-digital converter in the receiving branch converts the spin resonance signals, or a spin resonance signal transposed to a lower frequency range, into a digital signal, and in which a Fourier transformation circuit is located in a signal path subsequent to the analog-to-digital converter. The signal path between the analog-to-digital converter and the Fourier transformation circuit includes at least one combination of a digital filter and a sampling frequency reducing circuit. The output signal of the reducing circuit has sampling frequency which has been reduced by an integer factor with respect to its input signal and, the reduced sampling frequency is a non-integer factor lower than the frequency of the signal on the output of the digital filter.

摘要翻译： 一种磁共振光谱仪，其中接收支路中的模拟 - 数字转换器将自旋共振信号或转置到较低频率范围的自旋共振信号转换为数字信号，其中傅立叶变换电路位于 模数转换器之后的信号路径。 模数转换器和傅里叶变换电路之间的信号路径包括数字滤波器和采样频率降低电路的至少一个组合。 还原电路的输出信号具有相对于其输入信号减小了整数因子的采样频率，并且降低的采样频率是低于数字滤波器输出端的信号频率的非整数因子 。